:root {
    --primary-dark: #032B44;
    --primary-light: #1A73E8;
    --accent-orange: #FF9800;
    --accent-green: #388E3C;
    --neutral-light: #ffffff;
    --neutral-dark: #dddddd;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.2);
  }

  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  body {
    background: linear-gradient(135deg, var(--primary-dark) 30%, var(--primary-light) 70%);
    color: var(--neutral-light);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    min-height: 100%;
    overflow-x: hidden;
  }

  .container {
    max-width: 1200px;
    margin: 80px auto 40px;
    padding: 0 20px;
  }

  .header {
    text-align: center;
    padding: 40px 0;
    position: relative;
  }

  .header::after {
    content: "";
    display: block;
    width: 150px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-orange), var(--accent-green));
    margin: 20px auto;
    border-radius: 2px;
  }

  h1, h2, h3 {
    font-weight: 700;
    margin-bottom: 1.5rem;
    position: relative;
  }

  h1 {
    font-size: 2.5rem;
    background: linear-gradient(90deg, var(--neutral-light), var(--neutral-dark));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: var(--shadow-sm);
  }

  h2 {
    font-size: 1.8rem;
    padding-bottom: 10px;
    border-bottom: 2px solid rgba(255,255,255,0.1);
    margin-top: 3rem;
  }

  h3 {
    font-size: 1.4rem;
    margin-top: 2rem;
    color: var(--accent-orange);
  }

  p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--neutral-dark);
  }

  strong {
    color: var(--neutral-light);
  }

  em {
    font-style: italic;
    color: var(--accent-green);
  }

  .content-block {
    background: rgba(255,255,255,0.05);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .content-block:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
  }

  pre {
    background: rgba(0,0,0,0.3);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    border-left: 4px solid var(--accent-orange);
  }

  code {
    color: var(--accent-green);
    font-family: 'Courier New', monospace;
  }

  .image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
  }

  .decorative-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
    filter: grayscale(30%) contrast(110%);
  }

  .decorative-image:hover {
    transform: scale(1.03);
    filter: grayscale(0%) contrast(100%);
  }

  .notice {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--primary-light);
    color: white;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    animation: pulse 2s infinite;
  }

  @keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
  }

  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin: 40px 0;
  }

  .nav-link {
    padding: 10px 20px;
    background: rgba(255,255,255,0.1);
    border-radius: 6px;
    text-decoration: none;
    color: var(--neutral-light);
    transition: all 0.3s ease;
    border: 1px solid rgba(255,255,255,0.2);
  }

  .nav-link:hover {
    background: var(--accent-orange);
    transform: translateY(-3px);
  }

  @media (max-width: 768px) {
    .container {
      margin-top: 60px;
    }
    
    h1 {
      font-size: 2rem;
    }
    
    h2 {
      font-size: 1.5rem;
    }
    
    .content-block {
      padding: 20px;
    }
    
    .image-grid {
      grid-template-columns: 1fr;
    }
  }